Sunline P.E Line X8 Siglon Advance 300M P.E 4 50LB Blue (6438)8 strand PE braided line with advanced gel spun polyethylene fibers for high strength and low stretch. 0. 43mm diameter, 50lb breaking strength. Blue color for moderate visibility in clear water. Smooth casting, high abrasion resistance, and minimal memory. Sold as a 300 meter spool. TARGET USE: Heavy duty saltwater or freshwater fishing for large species like tuna, amberjack, or pike where low stretch and high strength are critical.